1002003001 has 16 divisors (see below), whose sum is σ = 1086027264. Its totient is φ = 920934144.

The previous prime is 1002002993. The next prime is 1002003047. The reversal of 1002003001 is 1003002001.

It is a cyclic number.

It is not a de Polignac number, because 1002003001 - 2³ = 1002002993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1002000001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 198430 + ... + 203416.

It is an arithmetic number, because the mean of its divisors is an integer number (67876704).

Almost surely, 2^1002003001 is an apocalyptic number.

It is an amenable number.

1002003001 is a deficient number, since it is larger than the sum of its proper divisors (84024263).

1002003001 is a wasteful number, since it uses less digits than its factorization.

1002003001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5280.

The product of its (nonzero) digits is 6, while the sum is 7.

The square root of 1002003001 is about 31654.4309852507. The cubic root of 1002003001 is about 1000.6672217162.

Adding to 1002003001 its reverse (1003002001), we get a palindrome (2005005002).

The spelling of 1002003001 in words is "one billion, two million, three thousand, one".